About ADHD Test Online
Free, confidential ADHD screening using the WHO ASRS and SNAP-IV questionnaires. Evidence-informed tools for self-reflection and learning.
Last reviewed: December 2024
Our Mission
Many adults and parents have questions about attention, focus, and executive function. Our mission is to provide free, accessible ADHD screening based on widely used research tools—so people can reflect on their patterns, learn, and find helpful resources.
Research Foundation
Our adult screening references the WHO ASRS-v1.1, and our child screening references SNAP-IV
The ASRS (Adult ADHD Self-Report Scale) used on this platform was developed by the World Health Organization in collaboration with ADHD researchers. Our site provides an educational digital screening experience; it is not a medical service and is not endorsed by WHO.
Dr. Ronald C. Kessler
Professor of Health Care Policy
Harvard Medical School
Lead developer of the WHO Adult ADHD Self-Report Scale (ASRS). Pioneer in epidemiological research on mental health disorders.
Key Publication:
Kessler, R. C., et al. (2005). The World Health Organization Adult ADHD Self-Report Scale (ASRS): a short screening scale for use in the general population. Psychological Medicine, 35(2), 245-256.
View on PubMedDr. Lenard Adler
Professor of Psychiatry and Child & Adolescent Psychiatry
NYU School of Medicine
Co-developer of the ASRS and a leading researcher in adult ADHD assessment and support. Director of the NYU Adult ADHD Program.
Key Publication:
Adler, L. A., et al. (2006). Validity of pilot Adult ADHD Self-Report Scale (ASRS) to rate adult ADHD symptoms. Annals of Clinical Psychiatry, 18(3), 145-148.
View on PubMedDr. Thomas Spencer
Associate Professor of Psychiatry
Harvard Medical School
Co-developer of the ASRS with extensive research on ADHD across the lifespan.
Key Publication:
Spencer, T., et al. (2007). Further evidence of dopamine transporter dysregulation in ADHD: a controlled PET imaging study using altropane. Biological Psychiatry, 62(9), 1059-1061.
View on PubMedNote: These researchers developed the original ASRS screening instrument for the World Health Organization. Our platform provides a digital implementation of their publicly available screening tool for educational purposes.
ASRS Background
The ASRS was developed as part of the WHO World Mental Health Survey Initiative. It has been translated and studied in multiple settings. We reference the ASRS for adult screening education, while keeping a clear boundary between screening and diagnosis.
- Developed through the WHO World Mental Health Survey Initiative
- Studied in population and clinical research contexts
- Useful for screening and discussion, not diagnosis
- Referenced here for educational self-reflection
Our Approach
We prioritize evidence, privacy, and accessibility:
Recognized Screening Questionnaires
We use the Adult ADHD Self-Report Scale (ASRS) developed by the World Health Organization and the SNAP-IV for children—tools that are widely used in research and practice.
Learn about our assessmentsComplete Privacy
Your test answers are processed in your browser and are not stored on our servers. No account is required, and we do not sell screening responses.
Read our privacy policyEvidence-Informed Design
Our questionnaires and scoring follow published research and established screening approaches. We focus on clarity and self-reflection, not diagnosis.
Comprehensive Resources
Beyond screening, we provide source-based information about ADHD patterns, support options, and how to find professional help if you choose.
Explore ADHD resourcesContent Standards
We maintain rigorous standards for all content:
- Adult screening references ASRS-v1.1 and child screening references SNAP-IV
- Educational content is reviewed against peer-reviewed research and major public-health sources
- Information is sourced from NIMH, CDC, and peer-reviewed research
- Content is regularly updated to reflect current evidence and guidance
- Clear distinction between screening and diagnosis is maintained
Our Commitment
We are committed to providing accurate, helpful, and judgment-free information about ADHD. We recognize that attention and executive-function challenges can show up differently across ages, backgrounds, and contexts. Our goal is to help people understand their patterns and connect with helpful resources and support.
Professional & Research Resources
For more information about ADHD research and professional support:
World Health Organization - ADHD
Official WHO resources and the original ASRS screening tool
National Institute of Mental Health (NIMH)
Comprehensive ADHD information from the US government
CHADD - Children and Adults with ADHD
Leading nonprofit providing ADHD education and advocacy
ADHD Foundation
UK-based organization providing ADHD support and resources
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Start Free ADHD ScreeningImportant Disclaimer
Our screening tools are for educational purposes only. They cannot diagnose ADHD—only a qualified professional can do that after a comprehensive evaluation. If attention-related challenges are significantly interfering with daily life, consider seeking a professional evaluation.